Climate change impact on wastewater networks
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The main findings of this thesis are summarized below : The extrapolations from precipitation analysis are too large for long term planning to be use in design drainage system. The 10 years periods of time are too short to make robust and useful IDF Curves for a long term . The precipitation is more frequent. The same rain can occurs more often nowadays than in the past. The increasing trend of maximum precipitation data is found. In every duration ( from 1 min to 1440 min ) the volume of rainfall becomes higher. Carrying out the climate change impact assessment study concerning urban drainage systems is a challenge, as limitations of computer software and hardware makes both computations and results analyses complicated. The data are the gold. It have to remember that data are the future in analysis and now the goal is not only predict and think about future but also pay attention to collect the data now for future analysis. Development of techniques involved the best measurement and keep control all the time. Technologies have huge influence on collecting data. After renovation at Risvollan in 2001 the precipitation data have become more accurate.